[Interferon-alpha controls HPV infection in cervix epithelium]

Area of Science:

• Immunology
• Virology
• Oncology

Background:

• Human papillomavirus (HPV) infection, particularly HPV-16, is linked to cervical cancer.
• A diminished immune response is crucial for persistent HPV infection and oncogenic virulence.
• Interferon-alpha (IFN-alpha) is investigated as a potential prognostic indicator for HPV infection.

Purpose of the Study:

• To investigate the role of the immune system in determining HPV infection in cervical epithelium.
• To evaluate IFN-alpha as a prognostic parameter for HPV infection.
• To compare IFN-alpha levels in different risk groups with varying HPV statuses.

Main Methods:

• Measurement of cytokines (IFN-alpha, IFN-gamma, TNF-alpha) from stimulated peripheral blood mononuclear cells (PBMC) using monoclonal IFN-antibodies and ELISA.
• Detection of HPV-16 DNA using Polymerase Chain Reaction (PCR) targeting e6 and e7 regions, followed by Southern-blot.
• Comparison of IFN-alpha levels across control, prostitute, and HIV-infected groups, stratified by HPV-16 status.

Main Results:

• Stimulated IFN-alpha levels were significantly lower in prostitutes (98 U/ml) and HIV-infected individuals (49 U/ml) compared to controls (169 U/ml).
• Within all groups, HPV-16 positive individuals exhibited significantly lower IFN-alpha levels compared to HPV-16 negative individuals.
• Specifically, HPV-16 positive controls had 38 U/ml IFN-alpha, while HPV-16 negative controls had 193 U/ml. Prostitutes: 36 U/ml (pos) vs 94 U/ml (neg). HIV-infected: 13 U/ml (pos) vs 35 U/ml (neg).

Conclusions:

• IFN-alpha levels are significantly lower in individuals with HPV infection, particularly HPV-16.
• IFN-alpha demonstrates potential as a prognostic marker for HPV infection, reflecting immune system status.
• The study highlights the immune system's critical role in managing HPV infections and their oncogenic potential.